body {
    width: 800px;
    height: 800px;
    margin: 100px auto;
    background-color: black;
}

a {
    display: inline-block;
    margin: 40px auto;
    font: 80px "幼圆";
    color: rgb(255, 255, 255);
    text-align: center;
}

img {
    margin: 15px auto;
    display: block;
}